Jump to content
SAU Community

Recommended Posts

would standard pistons and rods be good for 300rwkw?? i am looking to run a rb30 with stardard bottom end

rb25de head gasket

r32 rb25de head with rb26 valve springs, gtr cams and standard manifold.

what sort of turbo would be best for 260-300rwkw, i am thinking a holset hx35 or a garrett 3040.

does that sound like a good idea. i would like any feed back people have

thanks

it's been mentioned in this thread that the GTRvalve springs can't easily be adapted for the rb25de head.

it would be easier to use the 25det valve springs.

it also been said that with GOOD tuning and supporting mods, keeping boost low, with correct sized turbo, 300rwkw can be achieved using stock na pistons and rods and stock gaskets.

but constant high revs will destroy the stock rods.

not sure about GTR cams in teh 25de head either.

standard manifold is ok.

turbo selection..... I don't know.. not up to scratch with my turbo knowledge in terms of what power the turbo's you've said will produce and at what boost levels.

I think you'd need to be a bit more specific with things like exhaust wheel size and so forth.

Is there a workshop in melbourne that has done the rb31det conversion before that you guys would recommend?

Was going to do most of the work my self but after reading about all the crap people go through with pistons and what not i think i would rather have a warranty.

Id asked this question before.

How does the ECU tell what gear the manual gearbox is in?

The Haltech has boost correction dependant on the gear selected, so i plan to use this to soften the power delivery in 1st gear once boost is wound up.

it seems the "search this thread" option is no longer available.

however, SYDNEYKID had stated that GTR valve springs are not a direct replacement for RB25de heads.

it was due to the lifter in 25 heads not being the same setup as the 26 head.

he mentioned that in his first RB30 build when he used the 25de head from an R32, he changed the valve springs and used 25det valve springs.

maybe he'll see this post and confirm or correct me.

Id asked this question before.

How does the ECU tell what gear the manual gearbox is in?

I have a sensor on 1 front wheel which picks up 5 pulses/revolution. You then calculate how many pulses will occur in 1km and enter this value into the sofware. You work out what each gear ratio equates to in kmh/1000rpm and enter the results plus the required boost correction for each gear and plug this into the software.

The ecu now has a speed reference via the wheel sensor in km, and by using the kmh/1000rpm figures plus the engine rpm it can determine which gear you're in.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Yeah, plenty of air flow, there is a dedicated path that feeds the air in to the OEM intake tube behind the bumper As for a "tangible effect", maybe, but getting the pod/intake air out of the hot engine bay is worth it psychologically to me, even if it gives no performance difference, so the tangible effect in my Lizard brain saysss yessss  In the end, to me a tangible effect isn't always about performance, sometimes it a sound or a look, or even a...... feeling  Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga Ooga-Chaka Ooga-Ooga
    • yeah first and reverse is where you will find clutch release issues (whether hydraulic or mechanical) because the difference in revs required is the highest there; particularly changing down from 2nd to 1st when still moving. To be clearer though, it is possible that the clutch release bearing is the wrong height. This is less likely than a hydraulic issue but it is not unheard of when you are mixing and matching
    • Quite right, if you make it to that pension you deserve every cent
    • Hi all, Restoring r33 series 1 rb25det. All the heater hoses were on their way out, have replaced them and put it all back together. After testing I noticed a small leak from behind the head on the actual metal water line to the turbo when cars warm. I tried running a longer hose over it but it kept leaking...   I am about to take the (stock) manifold off again😔 to change the water line does any one have any lines they recommend? I was looking at Aeroflow Turbo Oil & Water Line Set but not sure what everyone else recommends. Car is completely stock but want to upgrade turbo eventually. it looks like ill have to disconnect a lot just to replace these lines so if there's anything else recommended to do please let me know. Thank you in advance!
    • From memory, on the R33 GTSt at least, while everyone says "It's not adjustable", I found when I changed clutches in mine, it just needed a small adjustment on the rod length. But be very wary here, as you could end up trying to push the pushrod in the master too far, or blowing out the slave.   Most likely though, if the master/slave isn't bypassing internally or leaking out, then the throw out is the wrong height compared to the fingers on the clutch, so when it moves to disengage the clutch, it isn't 100% disengaged. You can check part of this out too by jacking the car up, having the engine running, put your foot on the clutch and try to engage 1st gear. If it goes in pretty easy (Compared to the ground) and/or the wheels start turning a fair bit and it takes a bit too much brake pedal to bring them back to a stop, this is likely the issue.  I'm not sure if you can adjust the height of the forks etc in these though, it's been that long since I've touched any RB gearbox.
×
×
  • Create New...